The detail-page bookmark toggle awaited the round-trip before updating and
had no catch — a failed create/delete threw unhandled and the user saw
nothing. It now flips optimistically (placeholder reconciled with the server
row on success), rolls back on error, and surfaces a toast, matching the
sibling like/dislike buttons.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
9cb2f152d3